Drilling machine



July 12,1927. 1,635,934

G. H. GILMAN DRILLING MACHINE Filed Aug. 22. 1923 2 Sheets-Sheet 1 July 12,1927.

G. H. GILMAN DRILLING MACHINE Filed Alli. 22/1923 2 Sheets-Shut 2 I raven/730:"

George I. GxJZman. 2 2 5978 Patented July 12, 1927.

UNITED: STATES I 1,635,934 PAT NT OFFICE.

GEORGE E. ennui, or BELMONT MASSACHiISMS.

DRILLING MACHINE.

Application filed August'22, 1923. Serial No. 658,525.

My invention relates to drilling machines and more particularly to a mounting for a percussive tool. j

My invention will be best understood from the following description when read in the light of the accompanying drawings of one specific embodiment of my invention selected for illustrative purposes; while the scope of my invention will be more particularly pointed out in the appended claims.

In the drawings 2- v Fig. 1 is a plan View of a drilling machine constructed according to my invenon;

Fig. 2is an elevation according to Fig. 1;

Fig. 3 is a view of the rearward end of the.

percussive tool when removed from the mounting and arranged for manual support; j

Fig. 4 is a section on the line-H of Fig. ,2; Y i Fig. 5 is a plan viewof the cradle with parts omitted;

Fig. 6. is a longitudinalhsection of the cradle; and

Fig. 7 is a section on the line 7--7 of Fig. 6.. i 1

Referring to the drawings and to the preferred embodiment of my invention I have shown a percussive tool of the hammer type, the casing of which comprises the rearward section 1, the forward section 3, and the intermediate sections 5 and 7,, these sections being held in assembled relation by means" ofa pair of side bolts 9. As shown the rearward section 1 is provided with a reduced portion 11 and at its rearward end with a boss 13 which is laterally extended to form duced at which forms shoulders 27. For

adapting the percussive tool to the mounting, against the shoulders 27 I place the ends of a U-shaped member or adapter plate 29, these ends being perforated to receive the side bolts which when tightened hold theadapar plate rigidly a. the percussive tool. At its lowerniost portion the forward v face of the adapter plate is provided with a forwardly directed lug 31.

The mounting for the percussive tool comrises a shell 33 having a trunnion support 35 and a cradle 37 At oppositesides the shell is rovided with portions 39 having the longitli' inally arran ed slots "41- in which are guide bars43 of its cradle slide. nf its forwardend the cradle is provided with an" upstanding lug14 7, the upper "portion jot which conforms to the surface of the tor ward section 3 of the percussivetool so as to support it, and is further provided with a perforation 51 which receives the, forwardly directed lug- 41 0f the adapterplate carried by the percussive tool. a

The rearward portions of the side bars of the cradle are provided with upstanding lugs 53 which embrace the reduced portion 11 of the rearward section of the percussive tool, thelugs 53 having the recesses 55 into which the lugs 15 fit when the lug .31onthe adapter plateis inserted into the perforation .51, of the lug 47 at the front end of the cradle.

At its rearward end the cradleis provided witha boss57 which is provided with a" screw threaded perforation receiving the bolt 59. At its forwardend the bolt 5.9 carries a yokev 61, the ends{63 of which bear against the rearward side of the lugs 15.

It will be noted by this construction that the lugs 53 and yokes 61 form the jaws of a vise of which the lugs 53 are'the fixed jaw and the yoke 61 themovable jaw.

For adapting the yoke 61 to irregularities and discrepancies in the percussive tools enu ,ployed I have shown the rearward face of the yoke 61 provided with the spherical socket 65 which receives-the sphericalhearl 67 of the bolt. Surrounding the rearward fend of the boltis a compression spring 69 one end of which fits into a notchZ 1 on the rearward face of the boss '57, while its 'rearward end engages ratchet teeth 73 formed on the forward face of the head '75 of the bolt 59. By this means when the vise is closed to clamp the lugs 15 between the jaws of the vise the spring 69 will prevent l0osen-, ing of the vise under the influence or vibration of the machine.

For feedingthe cradle relative to the shell the shell is provided with a pair of rear wardly extending 1 arms 77, the rearward ends of which carry a cross bar 79 which in a manner well understood by those skilled in the art forms a thrust bearing for the feed screw 81. I'have indicated the feed screw nut which cooperates with the feed screw in Fig. 6 at 83, the head 85 of the nut having the flattened sides 87 which bear against finished surfaces 89 on the inner sides of the guide bars 43 of the cradle. The feed screw nut is received by a boss 91 on the lowermost portion of the rearward end of the cradle, the projecting rearward por tion of the 'feed screw nut being screw threaded and receiving the nut .93 which holds it in position.

Although I have described for purposes of illustration one specific form of my in vention it is to be understood that within the scope of my invention wide deviations may be made therefrom without departing from the spirit of my invention.

Claims.

1. A drilling machine having in combination, a cradle, supporting means in which said cradle is slidingly mounted, means for feeding the cradle relatively to said supporting means, a percussive hammer tool, said tool having a reduced rearward end, lugs projecting from opposite sides of said reduced rearward end, said cradle having lugs at opposite sides thereof embracing said reduced rearward end of said percussive hammer tool and against which said lugs projecting from opposite sides of said re duced rearward end bear, releasable means for engaging the rearward end of said percussive hammer tool and forcing the same forwardly to clamp it against said lugs projecting from said cradle, said percussive hammer tool having side bolts, means -form-' ing forwardly facing shoulders at the forward portion of said percussive hammer tool, a member carried by said side bolts and clamped thereby against said shoulders, means carried by said member and cradle for detachably locking the two together, said lugs projecting from said reduced rearward end of said tool having means for attaching a handle to said tool.

2. A drilling machine having in'combination, a cradle, a percussive tool, means for detachably fastening the forward end portion of said tool to said cradle, said tool having at its rearward end a reduced portion with laterally projecting lugs, lugs carried by said cradle and embracing said reduced portion forwardly of said laterally projecting lugs, and means engaging the rearward end of said tool for forcing said laterally projecting lugs against said lugs carried by said cradle.

3. A drilling machine having in combina tion, a cradle, a percussive tool, cooperating means carried by said cradle and said percussive tool for lockingithe two together and holding them so locked when said tool is forced forward relative to said cradle, and means carried by said cradle and movable longitudinally thereof for engaging said tool and'forciug it forward relative to said cradle.

4. A drilling machine having in combination, a cradle, a percussive tool carried by said cradle, cooperating means carried by said cradle and tool for locking the forward portion of said tool to said cradle by forward motion of said tool relative to said cradle, a pair of jaws carried by said cradle, and means for moving one of said jaws forward toward the other jaw for clamping the rearward portion of said tool between said jaws and for holding said cooperating means in operative relation.

5. A drilling machine having in combination, a cradle, a percussive tool carried by said cradle, said tool having side rods, an adapter carried by said side rods for securing the forward portion of said tool to said cradle, a vise carried by the rearward end of said cradle, said vise having its movable jaw arranged to slide longitudinally of said cradle for clamping the rearward portion of said tool between said jaws.

6. A drilling machine having in combination, a cradle, a percussive tool, means forming a socket at the forward end portion of said cradle for receiving aforwardly directed lug carried by said tool, an upstanding jaw at the rearward end of said cradle against which a forwardly facing surface of said tool rests when said forwardly directed lug is inserted into said socket, a movable jaw carried by the rearward end portion of said cradle for engaging a rearwardly facing surface of said tool and means for forcing said last named jaw forwardly against said rearwardly facing surface.

7 A drilling machine having in combination a cradle,a percussive tool, means forming a socket at the forward end portion of said cradle for receiving a forwardly directed lug carried by said tool, an upstanding jaw at the rearward end of said cradle against which a forwardly facing surface of said tool rests when said forwardly di rected lug is inserted into said socket, a movable jaw carried by the rearward end portion of said cradle for engaging a rearwardly facing surface of said tool, and a screw threaded into a nut carried by said cradle for forcing said last named jaw forwardly against saidrearwardly facing surface.

8. Adrilling machine having in combination, a cradle, a percussive tool, means form ing a socket at the forward end portion of said cradle for receiving a forwardly directed lug carried by said tool, an upstanding jaw at the rearward end of said cradle against which a forwardly facin surface of said tool rests when said forwardly directed lugis inserted into said socket, a second jaw, a screw having a universal connection with said second jaw, said second jaw when said screw is operated being forced against a rearwardly facing surface of said tool for clamping said tool between said jaws.

9. A drilling machine having, in combination, a cradle, a percussive tool, means comprising relatively movable jaws for clamping the rearward end of said tool to said cradle and rigidly holding said tool against forward and rearward movement relatively to said cradle, and a lug and socket connection between the forward end of said tool and cradle comprising male and female parts engageable and disengageable by relative movement between said tool and cradle.

10. A drilling machine having in combination a cradle, a percussive tool, means for clamping the rearward end of said tool to said cradle, a plate detachably carried by the forward end of said tool, said plate having a forwardly directed lug, and means carried by said cradle forming a socket for receiving said lug.

11. A drilling machine having in combination a cradle, a percussive tool, means comprising relatively movable jaws for rigidly clamping the rearward end of said tool to said cradle, a plate rigidly and de-' tachably carried by the forward end of said tool, and means for connecting said plate and cradle by movement of said tool longitudinally of said cradle.

12. A drilling machine having in combination a cradle, a percussive tool, means comprising relatively movable jaws for clamping the rearward end of said tool to said cradle, said tool having a pair of side rods, a member clamped to said tool by said side rods and having openings through which said rods pass, and adetachable conn-ection between said member and said cradle.

13. A drilling machine having in combination a cradle, a percussive tool, means comprising relatively movable jaws for clamping the rearward end of said tool, to said cradle, said tool having side rods, a U- shaped member having perforations receiv ing said rods, the latter clamping said member rigidly in assembled relation with said tool, and said member and cradle having eooperating portions designed to prevent relative rotation between the two for locking them together.

14:. A drilling machine having in combination a cradle, a percussive hammering tool, means for securing the forward end of said tool to said cradle, a clamp carried by said cradle for clamping the rearward end of said tool to said cradle. a manually operated rotary member for actuating said clamp and yielding means for preventing turning of said rotary member and consequent loosening of said clamp under the influence of vibration of said machine.

' 15. A drilling machine having in combination a cradle, a percussive hammerin tool, means for securin the forward end of said tool to said cradle, a rotary member operating a clamp carried by said cradle for clamping the rearward end of said tool to said cradle, and a compression spring carried bysaid rotary member and cooperating therewith andwith a stationary part carried by said cradle for preventing loosening of said clamp under the influence of vibration of said machine.

16. In adrilling machine, a cradle having spaced guide bars. a cradle support havcradle are slidably mounted, a feed screw having a thrust bearing carried by said cradle support, a nut carried by said cradle, and said nut having flattened sides located between and bearing against said uide bars,

ing ways in which theguide bars of said whereby rotation of said nut relatively to said cradle is prevented.

17 A drilling machine having in combi nation, a percussive tool, a cradle for said tool, cooperating means on said cradle and tool for securing one to the other comprising a vise on said cradle with jaws movable relatively to each other longitudinally of said cradle, and handle attaching members on opposite sides of said percussive tool and transversely disposed thereto for engagement with said vise. 18. A drilling machine having in combi nation, a percussive tool, a cradle for said tool, cooperating means carried by said tool and cradle for locking one to the other by relative longitudinal movement, and a vise carried by said cradle for rigidly'clamping said tool to the cradle, said vise having a jaw movable longitudinally of said cradle.

19. A drilling machine having in combination, a cradle, a percussive tool carried by said cradle, said tool having the reduced portion 11 and lugs 15, and a vise carried by said cradle for gripping said lugs, said vise having cooperating jaws one of which is provided with the portions 53 engaging said lugs.

20. A drilling machine having in combination, a cradle, a percussive tool carried by said cradle, an adapter 29, carried by said tool, an ear'on said cradle, said adapter and ear having the cooperating slot 51 and lug 31, and clamping means comprising a forward stationary jaw and a rearward movable jaw carried by said cradle and engaging said tool for securing it rigidly to said cradle.

In. testimony whereof, I have signedmy name to this specification. 

